Surah Qaf 50:23

وَقَالَ قَرِينُهُۥ هَـٰذَا مَا لَدَىَّ عَتِيدٌ

And his companion, [the angel], will say, "This [record] is what is with me, prepared."

Translation: Saheeh International

Tafsir

And his companion the angel charged with him will say ‘This is what I have ready with me as testimony’ whereupon it will be said to Mālik the Keeper of the Fire

Excerpt from Tafsir al-Jalalayn, commentary on 50:23, via Quran.com. The reader has the full commentary and 9 more tafsirs.